ABSTRACT
This chapter reviews the existing models that may be used to guide research on individual differences (IDs) in performance under fatiguing conditions. It outlines theoretical perspectives from both neuroscience and cognitive psychology, as explanatory accounts of performance variation in fatigue. The chapter suggests that models focusing on IDs in fatigue state responses may provide a means for integrating multiple perspectives on IDs in fatigue vulnerability. It discusses psychometric and conceptual aspects of state models of fatigue. The chapter introduces "self-regulation" as an additional causal factor, which is embedded within feedback loops driven by internal and external cues to performance, with its own internal structure. It focuses on IDs in fatigue states may fulfill such an integrative role. Experimental studies of fatigue and performance typically reveal substantial IDs. The multidimensional state model explains effects of potentially fatiguing stressors on sustained attention.
